Merge "InputTracer: Disallow adding new targets from a derived event tracker" into main

void InputTracer::dispatchToTargetHint(const EventTrackerInterface& cookie,

                                       const InputTarget& target) {

    if (isDerivedCookie(cookie)) {

        LOG(FATAL) << "Event target cannot be updated from a derived cookie.";

    }

    auto& eventState = getState(cookie);

    if (eventState->isEventProcessingComplete) {

        // TODO(b/210460522): Disallow adding new targets after eventProcessingComplete() is called.

        return;

    }

    if (isDerivedCookie(cookie)) {

        // TODO(b/210460522): Disallow adding new targets from a derived cookie.

        return;

    }

    // TODO(b/210460522): Determine if the event is sensitive based on the target.

}